Claw clamping device for clamping camshaft

Abstract

The utility model provides a claw clamping device for clamping a cam shaft. The claw clamping device comprises a mounting plate, a clamping structure and a driving element, the clamping structure comprises a left clamping block and a right clamping block, the middle parts of the left clamping block and the right clamping block are hinged through a positioning pin, and the positioning pin is fixed on the mounting plate; a clamping opening is formed between the bottom end of the left clamping block and the bottom end of the right clamping block, the top end of the left clamping block and the top end of the right clamping block are hinged to one end of a left connecting plate and one end of a right connecting plate respectively, the other end of the left connecting plate and the other end of the right connecting plate are connected through a pin shaft, the pin shaft is fixed to a driving plate, and the driving plate is connected with the driving element. And the driving plate is driven by the driving element to move in the vertical direction. According to the claw clamping device for clamping the cam shaft, the cam shaft can be automatically clamped, the claw clamping device can adapt to cam shafts of various sizes, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a claw clamp device for clamping a cam shaft. Background Art

[0002] When tightening the camshaft sprocket bolts on the assembly line, it is necessary to use a claw clamp to clamp the camshaft to prevent the camshaft from rotating with the bolts during tightening, resulting in failure to tighten the bolts. Figure 1 As shown, the claw clamp currently used in this workstation is a manual claw clamp. Manual clamping consumes manpower, and the manual claw clamp is not compatible with a variety of camshaft sizes. It is necessary to prepare multiple manual claw clamps according to camshafts of different sizes, which increases production costs. In addition, the clamping accuracy of the manual claw clamp is not high, and the clamping force is not enough, which can easily cause the camshaft to slip, the bolts to be tightened unqualified, and the engine needs to be repaired, which consumes labor costs.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The utility model aims to provide a claw clamping device for clamping a camshaft, which can realize automatic clamping of the camshaft and can adapt to camshafts of various sizes, thereby reducing production costs.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A claw clamp device for clamping a camshaft comprises a mounting plate, a clamping structure and a driving element; the clamping structure comprises a left clamping block and a right clamping block, the middle parts of the left clamping block and the right clamping block are hinged by a positioning pin, and the positioning pin is fixed to the mounting plate; a clamping opening is formed between the bottom ends of the left clamping block and the right clamping block, the top ends of the left clamping block and the right clamping block are hinged to one end of a left connecting plate and a right connecting plate respectively, the other ends of the left connecting plate and the right connecting plate are connected by a pin shaft, and the pin shaft is fixed to a driving plate, and the driving plate is connected to the driving element so that the driving plate is driven by the driving element to move in a vertical direction.

[0007] According to an embodiment of the utility model, the driving element is a cylinder, which is arranged on the mounting plate; the end of the piston rod of the cylinder is connected to the driving plate.

[0008] According to one embodiment of the utility model, a detachable clamping plate is provided on the inner side of the bottom end of the left clamping block and / or the right clamping block.

[0009] According to one embodiment of the utility model, a dovetail groove is provided on the inner side of the bottom end of the left clamping block and / or the right clamping block, and the clamping plate is provided with a sliding block corresponding to the dovetail groove.

[0010] According to an embodiment of the utility model, a positioning bolt is passed through the bottom end of the left clamping block and / or the right clamping block, and the clamping plate is provided with a positioning screw hole corresponding to the positioning bolt.

[0011] According to an embodiment of the utility model, the positioning bolt passes through the dovetail groove, and the positioning screw hole is located on the sliding block.

[0012] According to an embodiment of the utility model, two ear plates are respectively provided on one side of the left clamping block opposite to the right clamping block, and the ear plates of the left clamping block and the ear plates of the right clamping block are staggered and plugged into each other and connected by the positioning pins.

[0013] According to an embodiment of the utility model, the claw clamping device for clamping the camshaft further includes a plurality of the clamping structures, and the driving plate of each clamping structure is connected to an adapter plate, and the adapter plate is connected to the driving element.

[0014] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are:

[0015] 1) The claw clamping device for clamping the camshaft provided in the embodiment of the utility model can realize automatic clamping of the camshaft, with high clamping precision and strong force, which greatly improves the qualified rate of bolt tightening;

[0016] 2) The claw clamping device for clamping the camshaft provided in the embodiment of the utility model solves the compatibility problem of camshaft sizes of various models and the problem of being unable to clamp due to camshaft size deviation;

[0017] 3) When the claw clamp device for clamping the camshaft provided in the embodiment of the utility model is worn, only the worn parts need to be replaced without replacing the entire clamping structure, which can greatly reduce material waste and spare parts costs;

[0018] 4) The claw clamp device for clamping the camshaft provided in the embodiment of the utility model can quickly replace the worn parts after being worn, which greatly reduces the difficulty of operation for maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0020] Figure 1 It is a schematic diagram of the structure of a manual claw clamp in the prior art;

[0021] Figure 2 A schematic diagram of the structure of a claw clamping device for clamping a camshaft provided in an embodiment of the utility model;

[0022] Figure 3 A schematic structural diagram of a claw clamping device for clamping a camshaft provided in another embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the installation of a clamping plate of a claw clamping device for clamping a camshaft provided in an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 1. Mounting plate; 2. Clamping structure; 20. Ear plate; 21. Left clamping block; 22. Right clamping block; 23. Positioning pin; 24. Clamping mouth; 25. Left connecting plate; 26. Right connecting plate; 27. Pin shaft; 28. Drive plate; 29. ​​Adapter plate; 3. Cylinder; 31. Piston rod; 4. Clamping plate; 41. Slider; 42. Positioning screw hole; 5. Dovetail groove. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0027] In the description of the present invention, "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. The directions or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense, for example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] like Figure 2As shown, the embodiment of the utility model provides a claw clamp device for clamping a camshaft, comprising a mounting plate 1, a clamping structure 2 and a driving element. The clamping structure 2 comprises a left clamping block 21 and a right clamping block 22, the middle parts of which are hinged by a positioning pin 23, and the positioning pin 23 is fixed on the mounting plate 1. A clamping opening 24 is formed between the bottom ends of the left clamping block 21 and the right clamping block 22 for clamping the camshaft. The top ends of the left clamping block 21 and the right clamping block 22 are respectively hinged to one end of a left connecting plate 25 and a right connecting plate 26, and the other ends of the left connecting plate 25 and the right connecting plate 26 are connected by a pin 27, and the pin 27 is fixed on a driving plate 28, and the driving plate 28 is connected to the driving element so that the driving plate 28 is driven by the driving element to move in the vertical direction.

[0029] The claw clamp device for clamping the camshaft provided in this embodiment has the middle position of the left clamp block 21 and the right clamp block 22 of the clamping structure 2 fixed on the mounting plate 1 by the positioning pin 23. At the same time, since the left clamp block 21 and the right clamp block 22 are hinged by the positioning pin 23, one of them can rotate around the positioning pin 23. During the rotation process, the width of the clamping opening 24 formed between the bottom ends of the left clamp block 21 and the right clamp block 22 changes, and a variety of camshafts of different sizes can be clamped. When the driving element drives the driving plate 28 to move upward, the top distance of the left clamp block 21 and the right clamp block 22 is pulled closer through the left connecting plate 25 and the right connecting plate 26, and the width of the clamping opening 24 is increased; conversely, when the driving element drives the driving plate 28 to move downward, the top distance of the left clamp block 21 and the right clamp block 22 is pulled larger through the left connecting plate 25 and the right connecting plate 26, and the width of the clamping opening 24 is reduced, so that the gap of the clamping opening 24 is adjustable, and it is compatible with a variety of camshafts with different sizes. At the same time, by driving the driving plate 28 through the driving element to perform the clamping operation, automatic clamping can be achieved, the clamping accuracy and clamping strength can be improved, and the tightening qualification rate can be ensured.

[0030] In one embodiment of the utility model, the driving element is a cylinder 3, which is arranged on the mounting plate 1, and the end of the piston rod 31 of the cylinder 3 is connected to the driving plate 28. The cylinder 3 is connected to an automatic control system to control the stroke of the piston rod 31, and then control the gap size of the clamping opening 24, so that the claw clamp device provided in this embodiment can quickly adapt to camshafts of different sizes.

[0031] like Figure 3 As shown, in one embodiment of the utility model, the above-mentioned claw clamping device for clamping the camshaft further includes a plurality of the clamping structures 2 to clamp multiple camshafts at the same time, and the driving plate 28 of each clamping structure 2 is connected to an adapter plate 29, and the adapter plate 29 is connected to a driving element, for example, connected to the piston rod 31 of the cylinder 3. In this embodiment, two clamping structures 2 are provided to clamp two camshafts at the same time.

[0032] The contact part between the clamping structure 2 and the camshaft is frequently worn. Long-term high-frequency clamping will inevitably cause wear. After wear, the clamp will slip, resulting in the inability of the clamp to clamp the camshaft. In addition, if the entire clamping structure 2 is directly replaced after wear, it will cause cost waste. In order to solve the above problems, in a preferred embodiment of the utility model, Figure 4 As shown, the left clamping block 21 or the right clamping block 22 or the left clamping block 21 together with the right clamping block 22 is provided with a detachable clamping plate 4 on the inner side of the bottom end. The clamping plate 4 contacts the camshaft. When the clamping plate 4 is worn to a certain extent and cannot clamp the camshaft well, only the worn clamping plate 4 can be replaced, which reduces cost waste while ensuring the clamping effect. The operation and maintenance personnel can formulate a regular maintenance plan: collect the wear time of the claw clamp, formulate a periodic maintenance plan according to the wear speed of the clamping plate 4, and form active maintenance to avoid and eliminate equipment downtime caused by wear.

[0033] In one embodiment of the present invention, Figure 4 As shown, the installation structure of the clamping plate 4 can be: a dovetail groove 5 is provided on the inner side of the bottom end of the left clamping block 21 and / or the right clamping block 22, and the clamping plate 4 is provided with a slider 41 corresponding to the dovetail groove 5, and the clamping plate 4 is installed by inserting the slider 41 into the dovetail groove 5. The direction of the dovetail groove 5 can be vertical or horizontal, however, for the convenience of installation, the dovetail groove 5 in this embodiment is set to the vertical direction. Through the cooperation of the dovetail groove 5 and the slider 41, the clamping plate 4 can be quickly replaced after being worn, shortening the replacement time of the claw clamp due to wear and tear, and improving production efficiency.

[0034] In order to further fix the splint 4, as Figure 4 As shown, a positioning bolt (not shown) is penetrated through the bottom end of the left clamping block 21 and / or the right clamping block 22, and the clamping plate 4 is provided with a positioning screw hole 42 corresponding to the positioning bolt. Preferably, the positioning bolt passes through the dovetail groove 5, and the positioning screw hole 42 is located on the slider 41 for easy processing. Further preferably, the positioning screw hole 42 is located in the middle of the clamping plate 4, so that the clamping plate 4 is evenly and balancedly stressed when clamping the camshaft. Preferably, the positioning screw hole 42 is a blind hole, that is, it does not pass through the plate surface of the clamping plate 4, so that the contact surface between the clamping plate 4 and the camshaft is a complete smooth plane. In this embodiment, the worn part (clamping plate 4) is separated, and when the clamping plate 4 reaches a certain amount of wear, the wear problem can be easily solved by removing a positioning bolt.

[0035] In one embodiment of the present invention, Figure 4As shown, in order to ensure the structural strength of the middle hinged position of the left clamp block 21 and the right clamp block 22 and facilitate the connection between the two, two ear plates 20 are provided on each side opposite to the left clamp block 21 and the right clamp block 22, and the ear plates of the left clamp block 21 and the ear plates of the right clamp block 22 are staggered and plugged into each other and connected by the positioning pin 23.

[0036] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A claw clamping device for clamping a camshaft, characterized in that: The invention comprises a mounting plate (1), a clamping structure (2) and a driving element; the clamping structure (2) comprises a left clamping block (21) and a right clamping block (22); the middle parts of the left clamping block (21) and the right clamping block (22) are hingedly connected by a positioning pin (23); the positioning pin (23) is fixed on the mounting plate (1); a clamping opening (24) is formed between the bottom ends of the left clamping block (21) and the right clamping block (22); the top ends of the left clamping block (21) and the right clamping block (22) are hingedly connected to one end of a left connecting plate (25) and a right connecting plate (26) respectively; the other ends of the left connecting plate (25) and the right connecting plate (26) are connected by a pin shaft (27); the pin shaft (27) is fixed on a driving plate (28); the driving plate (28) is connected to the driving element, so that the driving plate (28) is driven by the driving element to move in a vertical direction.

2. The claw clamping device for clamping a camshaft according to claim 1, characterized in that: The driving element is a cylinder (3) which is arranged on the mounting plate (1); the end of the piston rod (31) of the cylinder (3) is connected to the driving plate (28).

3. The claw clamping device for clamping a camshaft according to claim 1, characterized in that: A detachable clamping plate (4) is provided on the inner side of the bottom end of the left clamping block (21) and / or the right clamping block (22).

4. The claw clamping device for clamping a camshaft according to claim 3, characterized in that: A dovetail groove (5) is provided on the inner side of the bottom end of the left clamping block (21) and / or the right clamping block (22), and the clamping plate (4) is provided with a sliding block (41) corresponding to the dovetail groove (5).

5. The claw clamping device for clamping a camshaft according to claim 4, characterized in that: A positioning bolt is passed through the bottom end of the left clamping block (21) and / or the right clamping block (22), and the clamping plate (4) is provided with a positioning screw hole (42) corresponding to the positioning bolt.

6. The claw clamping device for clamping a camshaft according to claim 5, characterized in that: The positioning bolt passes through the dovetail groove (5), and the positioning screw hole (42) is located on the sliding block (41).

7. The claw clamping device for clamping a camshaft according to claim 1, characterized in that: Two ear plates (20) are respectively provided on one side of the left clamping block (21) and the right clamping block (22) opposite to each other. The ear plates of the left clamping block (21) and the ear plates of the right clamping block (22) are mutually staggered and plugged and connected via the positioning pins (23).

8. The claw clamping device for clamping a camshaft according to any one of claims 1 to 7, characterized in that: It also comprises a plurality of the clamping structures (2), wherein the driving plate (28) of each clamping structure (2) is connected to an adapter plate (29), and the adapter plate (29) is connected to the driving element.

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